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| Description: Prevalence of drug use in the United States. Figures are based on a survey of people 12 years of age and over who live in households and used the drug in question at least once in the last month. (Based on the National Survey on Drug Use and Health, 2011.) Picture Stats: Views: 407 Filesize: 70.12kB Height: 579 Width: 732 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=30447 |